Evaluation and different control methods of the transformer noise (Literature survey)

Abstract

The importance and recent achievements in the field of noise control of power transformer are expounded in this paper. Oscillation is presented as the reason for the transformer and cooling system noise. The methods used in transformer noise research are summed up. The measures for controlling the transformer noise are introduced in detail. High-quality silicon-steel is suggested to be used, as well as adopting some effective measures when design, machining and install transformers. Assuasive equipments, muffler, sound insulation board and isolation booth, which will result attenuation in noise transmission, are proposed in order to reducing noise. As an important power transfer station, the transformer substation is also the main noise source in power transmission project. It will inevitably affect the station staff, nearby residents, and the local environment. Therefore, the research on substation noise control methods is particularly important. Transformers located near a residential area should have sound level as low as possible. The design and the manufacture of a transformer with low sound level require in-depth analysis of noise sources.